i am not a software engineer anymore, because i had to quit being software engineer because of medical reason. after launching and all pages finish loading the Nightly runs at around 25% CPU vs. To do this, return to about:support and click Refresh Firefox. If you don't see an improvement, you can enable those plugins again and try with a different set. check my blog

Reply fatterfox April 8, 2015 at 5:24 pm # it has been behaving that way since years now, can't even remember exactly when i started to have this issue. Even with everything loaded, it was using around 25% CPU while Flash player plugin was using 4% and 1GB of RAM. It's foolish accepting the browser to use so much RAM when the justified memory usage should be low! Youtube is prevented to start until you click on them, so you may launch them in several tabs and they wait for you to open the tabs. https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

Firefox Using Too Much Cpu Mac

However, if I don't see a problem, it doesn't exactly prove that it is an extension, because just restarting Firefox causes the problem to go away. I am using Bartab Heavy to unload tabs after 60 minutes which helps. Corporate boards aren't prepared for cyberattacks CEOs, board members need to bone up on cybersecurity and not leave those matters to CIOs, analyst says